Apparatus for internally striping can body side seams



N v- 28. 1939. A. L. KRONQUEST Filed June 29, 1958 3 Sheets-Sheet l WEMR A w w V. Hm D x mm w 1 I -I II I MI HHI I WM H MH I HHI I t I -..II.wt. r.I IIII: 9m. @m. I I I I I N O Wm. .& O N .R S

NOV. 28, 1939. A, KRONQUEST 218L332 APPARATUS FOR INTERNALLY STRIPING CAN BODY SIDE SEAMS Filed June 29, 1958 5 Sheets-Sheet 2 GUM ,4

Nov. 28, 1939.

A. L. IKRONQUEST 2.181332 APPARATUS FOR INTERNALLY STRIPING CAN BODY SIDE SEAMS Filed June 29, 1958 3 Sheets-Sheet-3 Snow Patented Nov. 28, 1939 UNITED STATES PATENT OFFICE APPARATUS FOR INTERNALLY STRIPING CAN BODY SIDE SEAMS Application June 29, 1938, Serial No. 216,578

7 2 Claims.

enamel or lacquer over the side seams of the 6 can bodies internally thereof.

In order to protect products packaged in completed containers from direct contact with the metal of which the containers are formed, it is customary to provide the containers with interior protective coatings. This coating usually is applied to the blanks from which the can bodies are formed. In the formation of the can bodies the blanks are fed along in a body maker, are formed about and side seamed on a forming horn, and 15 then, while the can bodies are being fed along on the horn, the side seams are suitably solder bonded. The protective coating is omitted from the portions of the blanks which are joined in the formation of the side seams so that efiicient solder bonding can be effected, and it is then-purpose of the present invention to provide novel means for applying the desired protective coating to these stripes of metal surface left bare in the region of the side seams internally of the can bodies.

An object of the invention is to provide a novel combination of means for moving the can bodies along in spaced relation, means for engaging the side seams internally of the can bodies as they are moved along, and means for applying protective coating material to the side seam engaging means.

Another object of the invention is to provide apparatus of the character stated in which the side seam engaging means comprises a roller equipment.

Another obiect of the invention is to provide apparatus of the character stated in which the side seam engaging means and the coating material applying means comprise roller equipments which interengage in the spaces intervening mov ing can bodies.

Another object of the invention is to provide apparatus of the character stated in which the applicator roller equipment is rotatab e in a bath of protective coating material and out of contact with the can bodies, and the s de seam enga ing roller equipment is movable into and out 50 of engagement with the applicator roller equipment through the spaces intervening adjacent moving can bodies.

Another object of the invention is to provide apparatus of the character stated in which the roller equipments are rotatable in a common plane containing the axes of the moving can bodies.

Another object of the invention is to provide an apparatus of the character stated in which the applicator rollers are positively rotated, and in which the side seam engaging rollers are link suspended to be movable by gravity into contact with the applicator rollers through the spaces between moving can bodies, and lifted by can body contact out of engagement with said applicator rollers to engage in rolling contact with the can body side seams internally of said can bodies.

With the above and other objects in view which will hereinafter appear, the nature of the invention will be more clearly understood by following the detailed description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a side elevation illustrating the invention.

Figure 2 is a plan view, parts being broken away.

Figure 3 is an enlarged detail side view of the applicator, parts being broken away and in section.

Figure 4 is a vertical cross section taken on the line 4-4 on Figure'3.

Figure 5 is a view similar to Figure 3 and illustrates the delivery end of the horn.

Figure 6 is a vertical cross section taken on the line 66 on Figure 5.

Figure '7 is a sectional perspective view illustrating a fragment of a can body with the protective stripe applied thereon.

The improved apparatus for striping can body side seams internally of the can bodies preterably is mounted for direct cooperation with the body maker whereby the can bodies are received from the body maker just after the seams thereof have been solder bonded. It is to be understood, however, that the apparatus is adaptable to use in any place where can bodies are being moved along under such control that the side seams thereof move in longitudinal alinement.

In the drawings, in which like numerals of reference indicate like parts in all of the figures, 5 designates a supporting arm at one end of which is supported a longitudinal housing 6, the latter being flange secured to the supporting arm as at T.

A pair of pedestals 8 are mounted upon the housing 6 in longitudinally spaced relation, and the pedestals support a pair of laterally spaced longitudinal supports or guides 9 for the can bodies, the supports being shaped to conform to the curvature of the can bodies. (See Figures 1, 4 and 6.)

Adjacent each pedestal 8 is mounted a support pin bearing block l0, and in each block there is provided a plurality of vertical bearings H for a group of horn supporting pins 92. The pins are vertically reciprocable in the bearings and project above and below the blocks as indicated in Figures 5 and 6 of the drawings. Each pin carries an adjustably mounted, tapered supporting head 13 engageable in a receiving socket i4 formed in the lower portion of a horn i5.

It will be observed by reference to Figure 1 of the drawings that a group of the pins is disposed beneath each end of the horn, and these pins constitute the sole supporting means for the horn and are movable, in a manner later to be described, for allowing can bodies to pass over and along the horn without being contacted by the supporting pins.

At its lower end each pin is link-connected as at l6 to an arm 91 pivoted-at 58 on a mounting shaft and equipped with a roller 59 disposed for engagement with a cam rotatable with a cam shaft 2| and including a lift portion 22. (See Figures 1, 5 and 6 of the drawings). The cam shaft 2| is rotated in timed relation with the movement of the can bodies along the horn, and the cams 20 are so positioned on the shaft 2! that the supporting pins are successively projected into and retracted from the receiving sockets E4 in the horn so as to be engageable with the horn only in the spaces intervening moving can bodies, as shown in figures l and 5 of the drawings. The arms ii are constantly urged downwardly by anchored spring equipments 23 so that the rollers were constantly held in engagement with the earns 20.

A channel beam 24 is supported as at 25 above the horn l5 and has an abutment bar 25 secured adjacent each end thereof and directly above said horn for preventing upward displacement of the horn thrusts imparted thereto. (See Figures 1, 5 and 6 of the drawings).

At its delivery end, the beam 24 supports an idler sprocket 21. The bracket 28 to which the beam 24 is secured at one end as at 25 is in turn secured as at 29 to a bracket 30, and a can body conveyor chain 3| passes over the idler sprocket 21 and over a driven sprocket 32 mounted on a sleeve which idles over a stud 33 supported in the bracket 30. The chain BI is disposed slightly to one side of the center of the horn as shown in Figures 2 and 6 of the drawings and is equipped with driving dogs 34 which are shouldered as at 35 so as to be supported against downward movement by a stationarily supported rail 36. The chain 3| is driven by sprocket and chain connections 31 from the feed chain 38 of a body maker. The feed dogs 39 of the body maker chain 38 deliver the can bodies to the apparatus described herein, and the can bodies are stripped from the body maker chain by the dogs 34 on the chain 3| which moves slightly faster than the chain 38.

In Figure '7 of the drawings, I have illustrated a fragment of a can body. The can bodies are designated C and have the inner surfaces thereof provided with a protective coating indicated at e and which terminates as at if so as to provide a bare strip of metal in the region in which the hooks h interengage to form the side seams. The metal is left bare in this region so as to avoid frustration of efiicient solder bonding- Af er th can bodies have been completed by the solder bonding operation the stripe s of protective coating is applied over the previously bare metal portions by the apparatus herein described.

A reservoir 40 containing a bath 4| of protective coating material is removably secured as at 42 in a recess 43 formed in the housing 8 between the guide supporting pedestals 8, as shown in Figures 1, 3 and 4 of the drawings. A pair of of applicator rollers 44 have their shafts 45 rotatably supported in bearings 46 provided in the reservoir so that the lower portions thereof will be immersed in the bath. To each shaft 45 is affixed a drive sprocket 41, and a chain 48 passes over both sprockets and serves to simultaneously drive both rollers 44 in a clockwise direction, as viewed in Figure 3.

The horn has the central lower portion thereof cut away or recessed as at 49 and equipped with a pair of mounting lugs 50 to each of which is secured a pair of links 5i which carry a roller 52 at their free ends. The rollers 52 are centrally grooved as at 53 to engage and fit over the can body side seams internally of the can bodies as illustrated in Figures 3 and 4 of the drawings.

It will beobserved by reference to Figures 3 and 4 of the drawings that the rollers 44 and 52 are mounted for rotation in a common plane ineluding the axes of the moving can bodies, and each of the rollers 52 is mounted directly above an applicator roller 44 so that it can gravitate into contact with the roller 44 and have protective coating material applied to it by said applicator roller.

As the can bodies are moved along and over the horn in spaced relation, as shown in Figures 1 and 3 of the drawings, the rollers 52 will drop down into engagement with the applicator rollers 44 and have coating material applied thereto through the spaces intervening the moving can bodies, and each time a can body moves past a roller 52 it will lift the roller 52 upwardly out of engagement with the associated applicator roller 44. The roller 52 thus lifted will apply its peripheral coating of material to the internal portion of the moving can body adjacent and over the side seam thereof, as shown in Figures 4 and 7. It will be observed that the applicator rollers 44 are spaced below the traveling can body C so that they do not contact the can bodies.

The reservoir can be supplied with coating material and drained through a pipe line 54.

After the can bodies have had the seam portions thereof striped internally they move onto and are carried off by spaced take-off chains 55, as shown in Figures 1 and 2 of the drawings.

It is, of course, to be understood that the details of structure and arrangement of parts may be variously changed and modified without departing from the spirit and scope of my invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is

1. In apparatus of the character described, means for moving side seamed can bodies in longitudinally spaced relation, a roller mounted for engagement with the moving can bodies and peripherally grooved to engage the side seams and can body-portions along each side of said side seams internally of the can bodies, a reservoir for coating material, an applicator roller partially immersed in the material in said reservoir and disposed beneath the path of movement of and out of contact with the can bodies, said rollers being disposed in a common plane containing the axes of the moving can bodies, means for imparting rotation to the applicator roller, and

means supporting the side seem engaging roller for movement into and out of contact with the applicator roller through the spaces intervening moving can bodies.

2. In apparatus of the character described, a horn, means for moving side seamed can bodies over and along the horn in spaced relation, movable means engageable with the horn at each end thereof for supporting it without interfering with can body movement thereover, and means mounted intermediate the ends of the horn for applying a stripe of protective coating material 5 over the side seams internally of the can bodies and peripherally grooved to engage the side seams and can body portions along each side of said side seams, said last-named means comprising a reservoir for coating material, an applicator roller partially immersed in the material and disposed beneath the path of movement of and out of contact with the can bodies, said rollers being disposed in a common plane containing the axes of the moving can bodies, means for imparting rotation to the applicator roller, and a seam engaging roller swingably supported on the horn and movable into and out of contact with the applicator roller through the spaces intervening moving can bodies.

ALFRED L. KRONQU'EST. 

